Lamp for projecting motion-picture machines



March 17, 1931. G p MARTINEZ 1,796,954

LAMP FOR PROJECTING MOTION PICTURE MACHINES Filed Aug. 28, 1928 2 Sheets-Sheet l k 0 7d a i" a 42 35156 51 I lg 3 "E5 v 4 2a 1 a5 55 3 ll 1t 16 22 12 0 I 2EHE INVE1 VTOR finish/2a P Marzmez A TTOR NEY March 17, 1931. G. P. MARTINEZ LAMP FOR PROJECTING MOTION PICTURE MACHINES Filed Aug 28 1928 2 Sheets-Sheet :3 Z i K INVENTOR. Gezeomo R MARTINEZ Ai'TORNEY Patented Mar. 17, 1931 GBEGOR-IO P. MARTIIIE PATENT OFFICE z, or LAREDO, TEXAS LAMP FOR lR-OJECTING- MOTIOT-I-PICT'ZTR-E; MACHINES Application filed August 28,

This invention relates to improvements in carbon lamps for motion picture machines and especially to simplified adjustment of the carbons so as to render the said carbons readily and easily adjusted by the operator.

A further object of the invention is to providea device of the class described of novel construction and arrangement of parts hereinafter more fully described, claimed and 0 illustrated in the accompanying drawing.

Fig. 1 is a front perspective view of my improved device showing the carbons in place.

Fig. 2 is a rear perspective view of my im- 15 proved device showing the carbons removed.

Fig. 3 is a top plan view thereof.

Fig. 4 is a front elevational view of the lamp house as used in combination with my improved are lamp.

As here embodied my improved device comprises a base of rectangular construction composed of front and rear members and 11, and side members 12 and 13, preferably of angle iron or suitable structural steel sec- 25 tions. A pair of rods 14 and parallel positioned are secured to the side members 12 and 13 in proximity to the front and rear members 10 and 11, respectively, and are longitudinally disposed.

A frame 16 of rectangular construction, preferably pressed steel or the like, somewhat smaller than the above mentioned base, has formed therein at either sides thereof apertures adapted to freely receive the above 35 mentioned rods 14 and 15 as a means of slidably mounting the frame 16 longitudinally on the said base.

The frame 16 is provided with front and rear lug elements 17 and 18, upwardly extended therefrom adapted to receive the rods 19 and 20, secured thereto, and transversely extended relative to the above mentioned rods 14 and 15.

A thumb screw :21 is thread dly mounted 45 in the side member 13 of the said frame and is provided with a knob 22, as a means of sliding the frame 16 in any desired position on the rods 14 and 15.

A support 23, preferably of cast metal is provided with lug elements 24, adapted to 1928. Serial No. 302,478.

freely receive the rods 19 and 20 as a means of slidably mounting the support 23 on the said rods, in a transverse or opposite direction relative to the frame 16. A thumb screw 25 is provided with a knob 26, and is threadedly mounted in the rear member 11 of the said frame as a means of sliding the support 23 in any desired position on the rods 19 and 20.

The support 23 has secured thereto and verticaily extended therefrom guide rods 27 and 28 upon which the holder 29 slides. I lever 30 is connected to the rod 31 rotatively mounted in. the support 23 and has pivotally secured thereto, at its extended extremity a link 32 pivotally connected to the holder 29. A thumb screw 33 is provided with a knob 34 and is threadedly mounted in the support 23 and engages the extended element 34 of the rod 31, as a means of raising the holder 29 by the manipulation of the thumb screw 33.

A holder proper 35 provided with a clamp 36, adapted to engage and removably hold a carbon 37. The holder proper 35 is secured in any desired manner to the extended extremity of a rod 38 slidably mounted on the above mentioned holder 29. This rod 38 has formed therein gear rack teeth which engage with a pinion rotatively carried on a stub shaft 39 mounted in the support 29. A bevel gear 40-is secured to the shaft 39 and meshes with a bevel gear 41 secured to the shaft 42 rotatively mounted in the support 29. An operating rod 43 is provided with a knob 44, or handle and is connected by means of a conventional universal joint 45 to the shaft The latter described construction is such as will permit the carbons 37 to be readily adjusted relative to the carbon 46.

The carbon 46 similar to the above mentioned carbon 37 is securedly held in a holder proper 35 provided with a clamp 36. The holder proper 35 is secured to the extended extremity of the rod 38 slidably mounted on the above mentioned support 29. The rod 38 has formed therein gear rack teeth which will engage with a pinion seciired to the above described construction being such as will permit the carbon 46 to be readily adjusted relatively to the carbon 37 by the operating rod a3.

The holder proper 35 is slidably mounted on the rod 38. An operating rod is provided with a knob 51 or handle and is rotatively mounted on the holder proper 35. The rod 58 has secured thereto a pinion which engages with the gear rack teeth formed in the rod 88 as a means of altering or changing the position of the carbon 46.

An operating rod 52 is provided with a knob 53 or handle and is connected by means of a universal joint 54: to a clamp screw 55 as a means of securely holding the holder proper 35 in any desired fixed adjusted position on the rod 38.

The above mentioned holders proper are provided with suitable terminals or terminal clips 55 and 56, respectively, as a means of attaching the electric circuit wires or cables thereto.

In Fig. 4 of the accompanying drawings, I have shown a lamp house adapted to suitably enclose or cover my improved arc lamp and the usual motion picture projecting mechanism such as commonly used to project such pictures. The said lamp house may be of any desired shape and design'57, preferably of rectangular box like construction. The

lamp house is provided with a. lens 58,

through which the motion pictures are projected. Suitable openings are formed therein through which the electric circuit wires 59 and 60 connected to the above mentioned terminal clips are extended. These wires are suitably connected to any convenient, suitable source of electric current as a means of providing the required electric current. The lamp house 57 is provided with a suitable ventilator 61, positioned at the upper portion thereof. A pair of doors 62 and 63, are hinged as at 64 and 65 to the opposite sides of the lamp house, and are of box like construction open at the bottom thereof, and reside upon the projected portions 66 and 67 of the lamp house when in a closed position. The latter described construction is such as will permit the doors 62 and'63 to be hinged upwardly as at '68 and 69 respectively, so as to permit ready access to my improved arc lamp. 7

It is understood that the hereinbefore de scribed base is secured to the bottom portion of the lamp housing and that the operating rods extend somewhat beyond the lamp house through suitable openings formed therein, so as to maintain the knobs secured therein accessible from the exterior of the lamp house.

7 Having thus described my invention what I claim as new and desire to secure by United States Letters Patent is:

1. In a carbon lamp, a frame slidably mounted longitudinally on a base, a means for readily sliding the said frame to any desired position on the said base, a support slidably mounted relatively transversely to the said frame on rods carried by the said frame, a carbon and a second carbon securely held in a holder proper and a second holder proper, the first mentioned holder proper secured to a rod, the second holder proper slidably mounted on the second rod, a means for sliding the said second holder proper on the said second rod in combination with a means for securely holding the said second holder proper in any desired position thereon, the said first and second mentioned rods being slidably mounted in the said support.

2. In combination with a carbon lamp, a frame slidably mounted longitudinally on a base, a means for readily sliding the said frame to any desired position on the said base, a support slidably mounted relatively transversely to the said frame on rods carried by the said frame, a carbon and a second carbon securely held in a holder proper and a second holder proper, the first mentioned holder proper secured to a rod, the second holder proper slidably mounted on the second rod, a means for sliding the said second holder proper on the said second rod in combination with a means for securely holding the said second holder proper in any desired position thereon, the said first and second mentioned rods being slidably mounted in the said support.

In testimony whereof I have aflixed my signature.

GREGORIO P. MARTINEZ.

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